Classic Wendigo

Unending Hunger. Although the wendigo is always starving, it does not need to eat, drink, or sleep to survive.

Ghastly Visage. When a creature first sees the wendigo it must make a DC 17 Wisdom Saving Throw or become terrified of the wendigo, using its turns to only run away. On a success the creature is immune to the Ghastly Visage for 24 hrs.

Magic Resistance. Due to its supernatural nature, the wendigo has advantage on all saving throws against magic and takes little damage from non-magical weapons.

On the Hunt. The wendigo has advantage on any checks made to hunt down its prey.

Supernatural Being. Should the wendigo's physical body be slain or destroyed, its spirit then attempts to possess any humanoid with less than half their hit points, transforming into the classic wendigo in 1d12 days. Unless it is banished by the banishment spell.

Mimicry. The wendigo can mimic any noise its hears sounding exactly the same.

Multiattack. The wendigo can make two melee attacks and use its consume flesh.

Claw. Melee Weapon Attack: +11 to hit, reach 10 ft., one target. Hit: 16 (4d8 + 5) Slashing Damage. The target must make a DC  17 Constitution Saving Throw or begin to bleed out taking 15 (4d6) Necrotic Damage per turn until it is magically healed.

Bite. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 20 (3d10 + 5) Piercing Damage.

Consume Flesh. The wendigo makes its Bite attack at a target in range, should the attack land the target takes the Bite damage and a following 24 (4d10) Necrotic Damage, bypassing resistances, as a chunk of flesh is torn from the target. The wendigo then heals equal to the amount of damage taken.